Bulletin, Issues 265-266

Front Cover
U.S. Government Printing Office, 1918
 

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Page 28 - HC1, with vigorous shaking until the precipitation of the cellulose is complete. Dilute to 20 liters, allow the cellulose to settle and decant the supernatant liquid. Wash by repeated changes of water, adding...
Page 12 - A description of the treatment given the preparations and the results obtained are given in Table I. TABLE I. — Results of...
Page 7 - Swingle, WT Bordeaux mixture: its chemistry, physical properties, and toxic effects on Fungi and Algae.
Page 7 - It is not necessary here to go into a detailed discussion of the chemical reactions that take place when copper sulphate and calcium hydroxid are brought together.
Page 19 - The results of the experiment are shown in Table III. TABLE III.
Page 10 - ... four weeks after the second. Three applications are necessary only in exceedingly wet seasons in sections where the disease is severe. Ordinarily two treatments, one about three weeks after the petals are off and the other four or five weeks later, are sufficient. A weak Bordeaux mixture, such as 3 pounds of copper sulphate and 3 pounds of lime to 50 gallons of water, is effective in controlling this disease, Bordeaux mixture of full strength not being required. b a For a combination treatment...
Page 43 - Sporotrichum thebaicum Ehrenb. Sporotrichum sporulosum Sacc. Fusarium sp. undet. Contrary to the general belief that soil fungi are largely confined to acid soils, the writers have found that the cellulose-dissolving forms multiply with great rapidity in alkaline soils when cellulose in the form of filter paper was added. While only preliminary studies of cellulose destruction in our soils have been made, the great variety and vigor of the cellulosedissolving fungi lead to the conclusion that cellulose...
Page 47 - Memoires de la Societe des Sciences Physiques et Naturelles de Bordeaux, ser.
Page 25 - Sections of the wood showed that the hyphse had entered the starch-bearing cells of the medullary rays of the sapwood and consumed the whole of the starch.
Page 9 - It is well known that through the agency of micro-organisms all vegetable matter is gradually transformed into the complex mixtures ordinarily known as humus...

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